题目:给定一个数组 nums 和一个目标值 k,找到和等于 k 的最长子数组长度。如果不存在任意一个符合要求的子数组,则返回 0。 示例 :输入: nums = [1, -1, 5, -2, 3], k = 3 输出: 4 解释: 子数组 [1, -1, 5, -2] …
*/classSolution{public:intnumSubarraysWithSum(vector<int>&A,intS){intn=A.size();vector<int>sum(n+1,0),f(n+1,0);for(inti=0;i<n;i++)sum[i+1]=sum[i]+A[i];//前n项和,不用考虑边界问题,将sum[0] = 0;f[0]=1;//因为sum[0] = 0,所以肯定有一个符合。intres=0;for(inti...
这题可以利用HashMap,把出现过的sum 当作key 存入, 把这个sum 出现过的次数 当作value 存入。 遍历nums array,一直更新sum,然后去map 里找有没有 sum - k,有的话说明 sum - k 是一个旧的sum,之前出现过。换句话说,新的sum - 旧的sum = k,说明 新的sum 减去 旧的sum,剩下的那一段的 和 等于k, ...
Because, there must be t, t<i, sum from 0 to t is sum-S, from t to i is S. Then count of S is count of sum-S. Time Complexity: O(n). n = A.length. Space: O(n). AC Java: 1classSolution {2publicintnumSubarraysWithSum(int[] A,intS) {3if(A ==null|| A.length =...
题目地址:https://leetcode.com/problems/subarray-sums-divisible-by-k/ 题目描述 Given an arrayAof integers, return the number of (contiguous, non-empty) subarrays that have a sum divisible byK. Example 1: Input: A = [4,5,0,-2,-3,1], K = 5 ...
1186 Maximum Subarray Sum with One Deletion 删除一次得到子数组最大和 Description: Given an array of integers, return the maximum sum for a non-empty subarray (contiguous elements) with at most one element deletion. In other words, you want to choose a subarray and optionally delete one element...
[leetcode] 209. Minimum Size Subarray Sum Description Given an array of n positive integers and a positive integer s, find the minimal length of a contiguous subarray of which the sum ≥ s. If there isn’t one, return 0 instead.
残酷刷题群:https://wisdompeak.github.io/lc-score-board/ 视频打卡列表:https://docs.qq.com/sheet/DTWdUcXBmdVptTmlZ (腾讯文档)本题代码和文字解析: https://github.com/wisdompeak/LeetCode/tree/master/Two_Pointers/992.Subarrays-with-K-Different-Integers...
今天看到了一道很有意思的题目和很有意思的解法。先放一下题目,Leetcode 644: Given an array consisting ofnintegers, find the contiguous subarray whose length is greater than or equal tokthat has the maximum average value. And you need to output the maximum average value. ...
Given an array A of integers, return the number of (contiguous, non-empty) subarrays that have a sum divisible by K. Example 1:Input: A = [4,5,0,-2,-3,1], K = 5Output: 7Explanation: There are 7 subarrays with a sum divisible by K = 5:[4, 5, 0, -2, -3, 1], [5...